A Second Foundation
Live documentUpdated May 14, 2026

The Legacy Formula

Version v0.6.7-rc7 · 18 parameters · 92 open caveats · confidence 6.78/10

dP(S_t, t)/dt = -∇·[A(S, Θ, G_t, I_t)·P] + ½∇²:[D(S, Θ, G_t)·P] + J[P]
Fokker–Planck equation with jump process · v0.6.7-rc7

June 2026 redesign

This formula is now one model among many

The 8-D Fokker–Planck equation below was the project's single artifact for 41 sessions — but it has no numerical solver, so it never produced a prediction (Tier 0). It is now registered as one variant in a competing model zoo and scored like any other. Here is where it and its rivals actually stand.

How the redesign works →
ModelFamilyBrierResolutionNeg-ctrlTier
ensembleequal-weight0.268
0.124
0.091T0
pitf_logitregime_logit0.219
0.139
0.188T1
train_freqempirical_frequency0.252
0.112
0.112T0
null_baselinenull0.370
0.095
0.038T0

The Equation, Explained

A Fokker–Planck equation with jump process. This describes how a probability distribution over civilization states evolves over time — with drift (predictable trends), diffusion (random fluctuations), and jumps (crises and collapses).

dP(S_t, t)/dt = -∇·[A(S, Θ, G_t, I_t)·P] + ½∇²:[D(S, Θ, G_t)·P] + J[P]
Fokker–Planck equation with jump process · v0.6.7-rc7
dP(S_t, t)/dtThe rate of change of the probability distribution over civilization states over time
P(S_t, t)The probability distribution over all possible macro-states S at time t
S_tThe macro-state vector — 8 dimensions describing a civilization at time t: population (n), wage share (w), elite fraction (e), debt ratio (d), urbanization (U), polarization (π), institutional trust (T), network connectivity (κ)
A(S, Θ, G_t, I_t)The drift vector — how the civilization tends to move, given parameters Θ, network topology G, and institutions I
D(S, Θ, G_t)The diffusion tensor — uncertainty and random fluctuations, how much noise affects each dimension
J[P]The jump process — sudden discontinuous changes (crises, collapses, revolutions) governed by the Psi stress index
ΘThe full parameter set: micro behavioral constants + cultural variables
G_tThe network topology at time t — how ideas, fear, and influence propagate
I_tThe institutional vector — 5 dimensions: regime type (R), veto players (V), bureaucratic capacity (B), propaganda effectiveness (P), external constraints (X)

The 8-Dimensional State Vector S_t

n

relative population (demographic pressure)

w

wage share of GDP (labor vs. capital distribution)

e

elite fraction (overproduction indicator)

d

debt-to-GDP ratio (fiscal fragility)

U

urbanization rate

π

political polarization index

T

institutional trust (0–1)

κ

network connectivity (information propagation)

Layer Contributions

Layer 1 — Micro-Foundation

Defines the 'particle parameters' Θ — probability distributions governing individual human choice. Loss aversion, temporal discounting, conformity pressure, authority deference, in-group favoritism. These parameters feed into the drift equations as behavioral constants.

Behavioral NeuroscientistEvolutionary Psychologist

Θ = {λ, β_td, γ_conf, α_auth, γ_status, ...}

Layer 2 — Meso-Structure

Defines how individual parameters aggregate into collective dynamics. Network topology G_t determines cascade thresholds and propagation speeds. The computational sociologist identifies the drift equations A_1, A_2, A_3 describing population, wage, and elite dynamics through the limit-cycle (Turchin secular cycle) framework.

Network ScientistComputational Sociologist

G_t = (N_t, E_t, w_ij, c_ij, φ_i)

Layer 3 — Macro-Dynamics

Supplies the empirical backbone — historical patterns that the formula must reproduce, economic power laws (Pareto distributions, debt cycles), and the institutional vector I_t that modulates drift through regime type, veto players, and bureaucratic capacity.

EconophysicistCliodynamicistPolitical Scientist

I_t = (R_t, V_t, B_t, P_t, X_t)

Layer 4 — Formalization

Builds the mathematical backbone: the Fokker–Planck equation with jump process, the Ito-corrected PSI stress index, diffusion tensor, and the Bayesian confidence architecture that converts model outputs into honest probabilistic forecasts with calibrated intervals.

Statistical PhysicistBayesian Statistician

Ψ = MMP × EMP × SFD (Ito-corrected)

Cross-Cutting — Epistemology

Attacks every output for curve-fitting masquerading as theory. Enforces falsifiability requirements, detects circular validation, distinguishes causal from correlational claims, and approves or rejects every formula update. No version of CURRENT.md can be committed without philosopher approval.

Philosopher of Science

Verdict ∈ {APPROVE, APPROVE_WITH_CAVEATS, REJECT}

Parameters (18)

Every parameter with its current estimate, confidence, and layer origin. Parameters marked with open disputes need further validation.

SymbolNameValueLayerConfidenceSources
λ

Loss aversion coefficient

LogNormal(0.55, 0.35)micro
72%
8
β_td

Temporal discount factor

Beta(6, 2)micro
68%
6
γ_conf

Conformity pressure

sigmoid(x; 0.3, 3.5)micro
65%
5
α_auth

Authority deference

1 open dispute(s)

0.61 ± 0.12 (HYBRID floor+overlay)micro
55%
7
c_coop

Cooperation frequency invariant

0.613 ± 0.089micro
82%
12
γ_ig

In-group favoritism

0.58 ± 0.15micro
70%
9
α_pareto

Pareto wealth exponent

1 open dispute(s)

1.5 ± 0.3 (fat tail)macro
75%
14
T_ineq

Inequality accumulation timescale

1 open dispute(s)

~125 yrmacro
52%
6
T_secular

Secular cycle period

1 open dispute(s)

[150, 265] yr (damped-spiral interpretation)macro
62%
11
E_threshold

Elite overproduction threshold

0.015 (1.5% of population)macro
60%
7
λ_0

Jump rate baseline

1 open dispute(s)

0.015/yrformalize
40%
8
Ψ_threshold

PSI crisis threshold

1 open dispute(s)

0.7formalize
45%
9
k_jump

Jump rate exponential sensitivity

2 open dispute(s)

LogNormal(log(2.5), 0.4)formalize
38%
5
η_pareto

Tempered-Pareto diffusion coupling

2 open dispute(s)

LogNormal(log(0.5), 0.8) — PROVISIONALformalize
25%
3
b_min

Subsistence wage regularization floor

1 open dispute(s)

0.03 (revised from 0.05)formalize
50%
4
β_U

Urbanization convergence rate

1 open dispute(s)

0.020/yrmacro
40%
5
π_path

Institutional path dependence

0.96macro
65%
8
δ_prop

Propaganda effectiveness

Beta(2, 5) → mean 0.28macro
55%
6

Version History (34 updates)

v0.6.7-rc7May 14, 2026Approved with caveatsEconophysicist (Session 38)

NO-CHANGE session. v0.6.7-rc7 PRESERVED (8th consecutive no-version-bump session). C26-G LOW-OVERDUE 8-session DISCHARGED-PENDING-CO-ATTESTATION-AND-MODERN-REGIME-SCOPING via Rosinski 2007 long-time-Brownian-limit identification σ_e ≡ σ_e_base (sensitivity bracket within F.28 prior 95% CI; Stat Physicist co-attestation owed S40+ with deep-agrarian λ_temp scoping per C38-I LOW). Option δ-Econ avenue formally analyzed with 4-candidate ranking. Candidate 1 (hyperinflation/fiscal-stress via Φ_fiscal(d) Alternative-B w_eq modification) ranked #1 at viability 0.50 → PROVISIONALLY DOWNGRADED 0.35-0.40 by Critique 38 per C38-J regime-dependence (rescue requires d* ≠ 0 at agrarian FP). NEW STRUCTURAL FINDING (BOUNDED READING MANDATORY per C38-H LOW): universal multiplicative-coupling FP-inaccessibility principle generalizes Session 37 result — any F_X(state) × A_i where A_i = rate × (state − target_i) collapses at FP linearization. Bounded scope: A_2/A_3/A_5/A_8 (clean mean-reverting) conform; A_1/A_4/A_6/A_7 (heterogeneous) require case-by-case analysis. Mode A source-verification gate caught a citation defect (C38-F MED — Sargent-Velde 2024 EER misattributed; actual paper Cutsinger-Rouanet-Ingber 2023 EER 157 doi:10.1016/j.euroecorev.2023.104510 Assignats or Death — does NOT address β_fiscal smoothness; second explicit hallucination-catch in project history after Critique 31). Empirical confirmations from 5 archival foundational sources (Rosinski 2007, Achdou et al. 2022, Auclert et al. 2025, Acemoglu-Ozdaglar-Tahbaz-Salehi 2015 AER, Gabaix-Gopikrishnan-Plerou-Stanley 2003 Nature). 10 new caveats (5 lead-issued LOW; 5 Critique-38-issued including C38-F MED). Zero parameter edits, zero functional-form changes. macro.md §O Closure Block appended byte-isolated. p_free = 42 PRESERVED. 9th consecutive drift-block carry-forward streak (S30 → S38). Confidence 6.77 → 6.78 (+0.01 ENDORSED) — held below lead's anticipated +0.02 by C38-F + C38-J.

v0.6.7-rc7May 14, 2026Approved with caveatsStatistical Physicist (Session 37)

Mode B execution of OQ-35-N F1 single-point analytical pre-screen at hash-committed ε_net = 0.30 / n_baseline = 0.96840 (third Stat Physicist Mode B in S32/S34/S37 back-to-back arc). VERDICT: FAIL-STRUCTURAL. The 3×3 Jacobian J3 at agrarian FP (0.96840, 1.00000, 0.001593) has all-real eigenvalues — zero complex pairs. Δ = +7.578×10⁻⁸ > 0; eigenvalues {+1.5813×10⁻², −9.5813×10⁻², −1.4526×10⁻²}/yr. Bit-identical to Session 34 minus-branch (a₁, a₂, a₃) — independent cross-validation that two distinct structural-revision attempts collapse to the same FP Jacobian. Load-bearing analytical finding: at the FP w* = w_0 exactly, so the (w_0 − w)/w prefactor of A_3 vanishes, collapsing both ∂A_3/∂n and ∂A_3/∂e to zero regardless of the F_n(n) multiplicative modulator. Bounded reading per C37-B LOW: any multiplicative coupling to A_3 carrying the (w_0 − w)/w prefactor is FP-inaccessible at the agrarian fixed point. Option δ-N Candidate 3 multiplicative form arc TERMINATED. C36-F LOW BINDING DISCHARGED via execution-triple hash commit (run-script SHA-256 6130ee1b...; results-JSON SHA-256 0884969e...; session-log SHA-256 13df6bcc...; all bit-identical re-verification by Critique 37 §2). NO §5.1 drift-block edit; NO version bump; v0.6.7-rc7 stands; p_free = 42 PRESERVED. macro.md §N Closure Block appended. 4 new C37 caveats: C37-A LOW (functional-form scope discipline — multiplicative-only verdict), C37-B LOW (universality scope-narrowing bounded reading), C37-C LOW (FP self-consistency 1.6% discrepancy must resolve before Option δ-class S38+ pre-registration), C37-D MED (Philosopher Mode B Option β re-evaluation meta-doctrine — 2-of-2 incremental structural revisions at same FP-collapse wall; Mode B at S40 latest). Confidence 6.75 → 6.77 (+0.02 ENDORSED; descending S32 +0.04 → S34 +0.03 → S37 +0.02 reflects diminishing marginal information from successive negative findings).

v0.6.7-rc7May 14, 2026Approved with caveatsCliodynamicist (Session 36)

C35-B HIGH BLOCKING discharge session. Same-day successor to Session 35. ε_net literature-anchored prior delivered as LogNormal(log 0.30, 0.50); median 0.30; 95% CI [0.113, 0.799]; F1 single-point = 0.30 per C35-A binding; n_baseline = n* = 0.96840 hash-committed from Session 29 §I.4 agrarian FP coordinate. Direct ∂(dE/dt)/∂N = μ analytically identified in canonical Turchin SDT (Turchin 2013) with cross-validation across 6 non-Turchin-authored historical cases (Stone 1965 Tudor-Stuart; Bourbon France venal-office; Elman 2000 Late Ming; Korotayev-Khaltourina 2006 Egyptian; Russian Time of Troubles; Turchin & Korotayev 2020 PLOS ONE US 1980-2019). Mode A source-verification gate CAUGHT first explicit arXiv-author hallucination in project history: arXiv:2405.01163 attributed to 'Stojkoski, Andjelković, Stojkoski (2024)' — actual authors Stachowiak, T. & Pasek, Z. (2024); μ₀ = 0.1 framing reworded from 'Polish-data fit' to 'adopted from Turchin (2013) with reported sensitivity'. Six BLOCKING inline edits applied. v0.6.7-rc6 → v0.6.7-rc7 (annotation-only patch-level bump; ε_net REGISTERED in macro.md §M as literature-anchored constant; NOT propagated to §5.1 drift block per C24-6 silent-creep doctrine). p_free = 42 UNCHANGED (literature-anchored constant; C15-3 NET-ZERO PRESERVED). C21-4 byte-invariance: macro.md §A–§L preserved byte-for-byte. CROSS-035-C MED DISCHARGED CLEAN. C30-A MED → LOW retirement. 6 new Critique 36 caveats including C36-A MED (arXiv citation-hygiene doctrine) and C36-F LOW BINDING (Stat Physicist S37+ must hash-commit ε_net + n_baseline + run-script SHA-256 before F1 execution). Confidence 6.73 → 6.75 (+0.02 RATIFIED) — decremented from proposed +0.05 by author-hallucination catch.

v0.6.7-rc6May 14, 2026Approved with caveatsNetwork Scientist (Session 35)

Structural-revision drafting session searching for a surviving secular-cycle mechanism after Option α arc TERMINATED at Session 34. Three candidate functional forms drafted analytically. Candidate 3 (n-coupled elite-mobilization rate ε_net entering A_3 with non-zero off-diagonal J[e,n] = ∂A_3/∂n) approved as a hypothesis under C35-A pre-registration discipline; Candidate 1 rejected (replicates Option α block-triangular failure); Candidate 2 rejected (over-reaches by importing Sun et al. 2023 triadic-percolation results from neuronal/climate networks into social secular-cycle context without primary-literature support). CROSS-069 b_min revision (0.05 → 0.03) RATIFIED via topology.md §12.1 strikethrough; CROSS-082 (further refinement to 0.01) REJECTED as silent creep, deferred indefinitely pending pre-registered empirical anchor (C35-F MED). C14-5 DISCHARGED NEGATIVE: industrial T_secular UNESTIMATED in literature, Georgescu 2023 PLOS One (PMC10621949) falsifies Turchin SDT for industrialized societies. NO CURRENT.md edit; v0.6.7-rc6 stands; p_free = 42 PRESERVED. Mode A source-verification gate PASSED (Critique 31 precedent honored). 6 new C35 caveats (none BLOCKING) including C35-A HIGH (F1 single-point evaluation discipline) and C35-B HIGH BLOCKING (ε_net causal anchor owed by Cliodynamicist S36 for OQ-35-N). Confidence 6.78 → 6.73 (−0.05) — first decrement since Session 31 REJECT.

v0.6.7-rc6May 9, 2026Approved with caveatsStatistical Physicist (Session 34)

Mode B execution of OQ-32-A piecewise-smooth border-collision Hopf F1–F5 numerical pre-screen under hash-locked Bayesian Session 33 pre-registration (5c05970f...). VERDICT: FAIL-STRUCTURAL at F1. All three κ_e ∈ {0.05, 0.10, 0.20} /yr cells returned same-sign positive cubic discriminants on both kink branches; both branches all-real saddle structure (1 positive + 3 negative real eigenvalues); zero complex eigenvalue pairs. F2 trivially fails (no complex pair → no ω⁺); F3/F4 short-circuit per pre-reg §3 conjunctive rule; F5 publication-bias memo MOOT. Confirmatory diagnostic stochastic run found random walk near kink — independently corroborating F1 FAIL. Option α arc TERMINATION RATIFIED at Critique 34 — the singular forward branch surviving Session 32 smooth-FP falsification is now also exhausted at piecewise-smooth level under literature-anchored agrarian priors. Empirical convergence: Wrigley-Schofield 1981 and Bengtsson-Dribe-Helgertz 2024 independently support absence of the sharp κ_e elite-driven mortality kink. v0.6.7 stable promotion path REMAINS FORMALLY CANCELED. macro.md §L Closure Block appended; §A–§K preserved byte-invariant. Mode A gate CLEAN (4-of-5 sampled sources verified; cubic discriminants re-derived bit-identical; principal-minor a₂-invariance re-derived symbolically). 4 new C34 caveats (none BLOCKING). Multiple C32/C33 caveats DISCHARGED/MOOTED. Network Scientist flagged as next-priority Session 35 lead for Option δ-class structural revision search. Confidence 6.75 → 6.78 (+0.03).

v0.6.7-rc6May 9, 2026Approved with caveatsBayesian Statistician (Session 33)

Procedural discharge session — third same-day session of 2026-05-09 (after S31 Neuroscientist REJECT and S32 Stat Physicist APPROVE_WITH_CAVEATS). Hash-committed OQ-32-A F1–F5 piecewise-smooth border-collision Hopf falsification bracket under SHA-256 5c05970f3702dde15cbdfe3a09d0642e5bb876bd108e48468849971d2908e910 over 32,058 bytes (C32-F LOW DISCHARGED). κ_e structural non-identifiability at smooth FP formalized: FIM eigenvalue → 0 because κ_e term inactive at FP; identification requires non-stationary observations (disintegrative-phase mortality trajectories). Information-content lower bound I_κe ≈ 6e-3 per trajectory; data-volume requirement N_traj ≥ 12–18 for posterior CV(κ_e) ≤ 0.20 (C32-A LOW formalized). C27-E independent-toolchain reproducibility CONFIRMED (Δ = +6.5007e-8 vs Session 32 lead; spectrum 1+/3- real, 0 complex). 6 new LOW caveats (C33-A through C33-F including arXiv 2409.19729 Sugasawa misattribution catch). NO formula edit; v0.6.7-rc6 stands; p_free = 42 PRESERVED. Confidence 6.70 → 6.75 (+0.05).

v0.6.7-rc6May 9, 2026Approved with caveatsStatistical Physicist (Session 32)

Session 32 Mode B pre-execution finding on OQ-29-A DRAFT 2 under Option α (κ_e elite→population direct-mortality coupling). Smooth-FP Hopf branch FALSIFIED at literature-anchored agrarian priors via Routh-Hurwitz a₂ = −3.776×10⁻⁴ < 0 plus cubic discriminant Δ ≈ +6.6×10⁻⁸ > 0 (4 real eigenvalues; saddle, 1-dim unstable manifold). a₂ INVARIANT under κ_e ∈ [0.05, 0.20] /yr via principal-minor structural argument (∂A_3/∂n = 0 = ∂A_3/∂e at FP forces Minor[n,e] = 0 INDEPENDENT of κ_e). Piecewise-smooth border-collision Hopf pathway IDENTIFIED (Filippov / di Bernardo style) but NOT pre-screened — registered as OQ-32-A with binding Session 35+ sunset clause (C32-E LOW). C32-F LOW pre-registration hash-commit discipline introduced. C30-C LOW resolved (softplus k_smooth = 100/e_baseline canonical). NO formula edit; v0.6.7-rc6 stands; macro.md §K Closure Block appended byte-isolated; p_free = 42 PRESERVED. Mode A source-verification gate CLEAN (zero new external numerical citations; arithmetic reproducible from first principles). Confidence 6.66 → 6.70 (+0.04).

v0.6.7-rc5April 28, 2026Approved with caveatsStatistical Physicist

Most consequential single-session falsification in formula history. OQ-25-D EXECUTED env-capable for first time in 26 sessions (Python 3.14.3, scipy 1.17.1) per the Session 26 frozen pre-registration (hash 27299d86...4ba6b7). Result: branch determination FAIL-A; mechanism FAIL-STRUCTURAL. Closed-form Jacobian at the analytical interior fixed point is block-triangular with all-real eigenvalues {−0.20, −0.08, −0.0145, +0.00106}/yr — no complex pair, no Hopf bifurcation possible at any agrarian-prior parameter setting. Both v0.6.6 deterministic-limit-cycle framing AND v0.6.7-rc1→rc4 noise-sustained-quasi-cycle reframing FALSIFIED at agrarian priors. The 8 Turchin secular cycles as empirical data are NOT falsified — what is falsified is one specific MATHEMATICAL MODEL of those cycles. State-vector decomposition, Bayesian framework, archetype taxonomy v1.0, Polymarket scoreboard, institutional vector I_t, Psi indicator NOT falsified. Drift-block functional forms might still be valid in modern-regime parameters; only agrarian regime conclusively falsified. Stable v0.6.7 promotion FORMALLY CANCELED at existing drift block. C12-7 falsification commitment RESOLVED-BY-FALSIFICATION. Path forward CANDIDATE only (η_n + ε bidirectional couplings; 0 new free parameters). NO SDE structural change THIS SESSION; annotation-only bump. Confidence 6.45 → 6.55 — pre-registered falsification firing against own prediction is epistemological progress, not regression. Subsequent Philosopher Mode A continuation Session 28 (2026-04-29) committed joint OQ-25-D-v2 pre-registration under SHA-256 a5940277defd7e65d89d303ead69bdb342e578de2c003e64009916ee67524e6a; no formula edit. Confidence 6.55 → 6.60.

v0.6.7-rc4April 27, 2026Approved with caveatsComputational Sociologist

C23-3 CLEAN attestation delivered via 4-anchor multi-method literature triangulation (Galí 2011 JEEA + Daly-Hobijn 2014 JMCB + Turchin 2003 + Wrigley-Schofield 1981). alpha_w prior tightened LogN(log 0.08, 0.30); 95% CI [0.044, 0.146]/yr. NET-ZERO retirement bundle: 1 retirement (κ_λ → derived constant h_0 = 1.219 from micro.md S1 LIVE λ̄=1.73; Tversky-Kahneman 1992 λ=2.25 explicitly DISCARDED) + 3 reclassifications (γ_K=0.69 Livi-Bacci central; e_max two-regime 0.03 agrarian / 0.10 modern; η_w=0.5 fixed-canonical macro-constant). Net free-prior change −4 (46 → 42); C15-3 NET-ZERO RESTORED conditional on Cliodynamicist OQ-23-A non-rejection of γ_K Livi-Bacci anchor. σ-noise priors PARTIAL: F.26 σ_n LogN(log 0.010, 0.5); F.27 σ_w LogN(log 0.030, 0.4); F.28 σ_e LogN(log 0.010, 0.5). OQ-25-D pre-registered (DOP853, 64-replica IC ensemble, hash 27299d86587a59dfceab07a4ebef5a7b130d00ac816564437df64c807ba4a6b7); execution env-blocked, handed to Stat Physicist Session 27. OQ-26-A: at proposed σ-noise priors, Alonso-McKane-Pascual spectrum is OVERDAMPED (refines, not invalidates, B24-3 sign prediction). Stable v0.6.7 promotion REMAINS DEFERRED. Confidence 6.20 → 6.45.

v0.6.7-rc3April 26, 2026Approved with caveatsBayesian Statistician

Scaffolding-only patch. OQ-24-A analytical PARTIAL via 3-way triangulation (Session 12 2D Jacobian -0.06 ± 0.02i + CROSS-054 slow eigenvalue ≈ -μ_0 + Wittmann-Kuehn 2024 DWM Hopf-slice). Predicted t_{1/2} ≈ 14.4 yr in pre-registered bracket [10, 20] yr — SUPERSEDES Session 24 [30, 70] yr per Philosopher Ruling 1 (analytically-derived, pre-numerical TIGHTENING is permitted). Three methodology pre-registrations: C23-4 Monte Carlo 95% CI (N ≥ 10,000 + Sobol); OQ-24-F hierarchical-budget cap σ(log T) ≤ 0.25; C14-1 PSIS-LOO BF 0.1/10 thresholds. C19-3 SQL infrastructure-blocker record filed. C23-3 alpha_w attestation NOT delivered by Comp Sociologist Session 25 close — DIRTY-branch confidence default. NO SDE structural change, NO new free parameters, NO retirements; p ≈ 46 unchanged. Confidence 6.35 → 6.20 (DIRTY-branch per Philosopher Ruling 7).

v0.6.7-rc2April 25, 2026Approved with caveatsStatistical Physicist

Literature-anchored reframing: closed A_1/A_2/A_3 system at agrarian parameters predicted to be a stable damped spiral, not a deterministic limit cycle, with oscillation sustained via the Alonso-McKane-Pascual 2007 demographic-noise amplification mechanism (Bladon-Galla-McKane 2010). Wittmann-Kuehn 2024 PLOS ONE shows Hopf bifurcation only in thin parameter slices; agrarian baseline outside the slice. Falsification tolerance widened [250, 300] → [230, 320] yr ensemble mean — Philosopher ruled PRINCIPLED (noise-induced lengthening + alpha_w sensitivity known a priori; prediction-HARDENING from 1 scalar to 4 signed predictions). macro.md §F NEW: registers γ_K, ε_loss, η_w, e_max, k_H, τ_ref, κ_λ, w_eq_0. C24-3 silent-creep audit on κ_λ; C24-6 BLOCKING-doctrine codified. C22-3 T_ineq watch CLOSED (3/3 PASS). Confidence 6.25 → 6.35 conditional.

v0.6.7-rc1April 24, 2026Approved with caveatsComputational Sociologist

First release-candidate version label in formula history. C12-7 BLOCKING PROPOSED-CLOSED via explicit algebraic closed forms for A_1/A_2/A_3 drift coefficients. A_1: logistic population growth with Psi-modulated K_eff plus Heaviside crisis-mortality (Turchin-Nefedov 2009; r ≈ 0.015/yr). A_2: mean-reversion -α_w(1-B_t)·[w-w_eq] with phi_loss kink and τ_ref ≈ 5yr endogenous reference wage (Galí 2010, Daly-Hobijn 2013; α_w ≈ 0.08). A_3: μ_0(1-V_t·X_t)·[(w_0-w)/w]·(1-e/e_max) (Turchin 2016; e_max ~0.10 agrarian). Linearized Hopf period T_lin ≈ 2π/√(r·α_w·η_w) ≈ 256 yr — structural match without target tuning, conditional on C23-3 alpha_w provenance attestation Session 24. A_1 label downgraded to CORRELATIONAL-AT-ALL-SCALES per Philosopher. C15-3 ESCALATION: NET +4 parameters (p ≈ 41 → 45); retirement debt owed Session 26. Confidence 6.10 → 6.25 conditional.

v0.6.6April 23, 2026Approved with caveatsEconophysicist

First NET-NEGATIVE parameter-budget session in formula history. C15-1 HIGH closed via Rosinski 2007 (Stoch. Proc. Appl. 117:677-707) tempered-stable theorem: η_pareto and α_pareto are structurally orthogonal in the Lévy-measure decomposition; no double-counting. T_ineq RETIRED to derived diagnostic (free count 42 → 41). Causal Status column added to §2 drift table (A_2 CAUSAL-AT-MICRO / CORRELATIONAL-AT-MACRO; A_3/A_5/A_7 CORRELATIONAL; A_4 CAUSAL-AT-IDENTITY). Logistic vs OU urbanization adjudication: P(logistic)=0.65, P(OU)=0.35 weights pending PSIS-LOO. LPPL crash SDs tightened. Dem 2028 first archetype firing executed: GATE_BLOCKED_NO_PREDICTION (POP_LEFT cluster ~8% vs hurdle 21.7%, gap -13.7pp; legitimate protocol behavior). Confidence 5.85 → 6.10.

v0.6.5April 23, 2026Approved with caveatsBayesian Statistician

C19-2 BLOCKING closed via dual-location sub-addendum pattern: full MR1-Turkey dual-coding protocol inlined into archetype_calibration_protocol.md §4.6 + forward-reference pointer at archetype_reference_classes.md §9.10 with §§1-8 byte-invariance attestation. Sub-addendum doctrine codified as a four-constraint protocol. Philosopher ruled the §§1-8 slice-hash 59b72533abc4c3ac002607bda7f48652ae591cdf9cd494007a76390c369db525 the load-bearing lock-commitment (CROSS-105 resolved). AND-gate firing rule formalized (3 scenarios must each clear ≥15% lift independently). First operational archetype prediction (Dem 2028, $1.09B) AUTHORIZED for Session 22+. C19-3 SQL execution auto-freeze extended Session 23 → Session 25 per C21-3. Confidence 5.75 → 5.85.

v0.6.4April 23, 2026Approved with caveatsPolitical Scientist

Mechanical-closure session. Taxonomy schema rotated v1.0.0 → v1.0.1 with new SHA-256 f9f022a19e1347032b89c7a1178a7d986f203e0a5eb3cf1632d964d000600964 (verified on disk by Philosopher). POP_RIGHT P_t/V_t numerical boundaries inlined into populist_right.md §§9-10. C18-1 closed: stale DRAFT adjective stripped from personalist_authoritarian.md §9.4. macro.md §E regime-wide vs archetype-conditional P_t clarification added. NET-ZERO parameter budget preserved. Reset cost on archetype retrodiction history: zero. Confidence 5.7 → 5.75.

v0.6.3April 23, 2026Approved with caveatsBayesian Statistician

C19-BS-1 closure package: 22-cell κ-propagated Beta posteriors over the 160-cell archetype × institution-vector grid; leave-Turchin-out BMA showing POP_RIGHT × LD × crisis-bulge robust at +4.6pp lift; C17-1 POP_RIGHT P_t/V_t profile boundaries LOCKED. Anchored on Tsebelis 2002, V-Dem v2mebias/v2mecenefm/v2juhcind, KESMA Hungary, Linz 1975. Conditional unfreeze granted for LD-profile POP_RIGHT predictions at horizons ≥6mo. Dem 2028 firing NOT authorized this session — deferred to Session 20+ pending CROSS-093/094/096/097 mechanical closures. 7 new C19 caveats. Confidence 5.6 → 5.7.

v0.6.2April 23, 2026Approved with caveatsCliodynamicist

Patch-level bump executing Political Scientist Memo M1-M6 file-side. C16-3 / CROSS-081 CLOSED via DRAFT → LOCKED v1.0 rename of historical_tests/events/archetype_reference_classes.md. Locked file SHA-256 91a464ae72201a08d3cf36a7ba665aefb0a29117759a8e3514bd304d51942fc4; reassignment JSON SHA-256 575e93a01bb942449d1ed5bb824fbbbccf39df25127889442840eafa1c6b3395; taxonomy schema hash 1a9225f0... preserved. C17-2 RESOLVED with merged-at-§4.1 / split-at-§4.3 decision. Interwar fascism (Germany 1933 NSDAP, Italy 1922/1924, Hungary 1939/1944, Austria 1934, Romania 1937) marked UNCLASSIFIED per M4. Spain 1939 + Portugal 1933 reassigned to personalist_authoritarian (NR3 exceptions). CROSS-072 PARTIAL: T_secular tagged LEAST CIRCULAR among the three flagged Turchin parameters. No SDE parameter value changes; net-zero budget preserved. Epistemological confidence 5.5 → 5.6.

v0.6.1April 21, 2026Approved with caveatsPolitical Scientist

BLOCKING closure session. Patch-level bump; schema hash 1a9225f0... PRESERVED via C17-3 byte-reversion (TISZA facts migrated to a §9.8 sub-addendum outside the v1.0.0 hash base). Scope restrictions only, no SDE changes. C16-1a CLOSED: personalist_authoritarian restricted to regime-transition predictions; AUTH_PERS × LD and AUTH_PERS × ED cells NOT APPLICABLE (GWF 2014 regime-level classification is decisive). C16-1b CLOSED: symmetric mirror restriction on reformist_liberal in post-backsliding contexts (REFORM_LIB × EA, REFORM_LIB × CA NOT APPLICABLE). CROSS-086 CLOSED: populist_right two-profile split (Liberal-Democratic vs Electoral-Autocratic) grounded in Hungarian media-capture asymmetry (~80% indirect Fidesz media control via KESMA vs no equivalent in US/Italian LD contexts). Memo M1-M6 produced for ~23 NAT_AUT/MIL_REL historical case reassignments; file-side execution handed off to Cliodynamicist Session 18. TISZA VERIFIED RETRODICTED EXEMPLAR (Brier 0.0400 formula vs 0.0729 market) documented in reformist_liberal.md §9.8. Retrodiction tally unchanged (8 pass / 4 partial / 0 fail / 2 untestable). Epistemological confidence UNCHANGED at 5.5/10. Archetype operational freeze continues — sole remaining BLOCKING item is C16-3 Cliodynamicist Session 18 file-side execution.

v0.6.0April 20, 2026Approved with caveatsTri-Lead (Political Scientist + Comp Sociologist + Cliodynamicist)

Archetype Taxonomy v1.0 LOCKED — 8 ideological-archetype reference classes defined (populist_right, reformist_liberal, personalist_authoritarian, + 5 others) with pre-registered coding rules from CHES, PopuList, V-Dem, Manifesto Project. 8 historical baselines initialized. Archetype-level predictions remain operationally frozen pending C16 closure chain. First archetype-conditional Polymarket scoring applied to the Hungary TISZA prediction (retroactively scored as populist-right vs reformist-liberal archetype contest).

v0.5.9April 18, 2026Approved with caveatsBayesian Statistician

OVERFITTING REGIME FORMALLY DIAGNOSED: p≈42 free parameters, n_eff≈6–14 independent observations. Practical R² ceiling ≈0.05–0.15 at 1yr horizon. PARAMETER FREEZE enacted (net-zero budget — nothing new without retiring existing). Prior catalog expanded 20→27. Circular audit expanded 4→7 parameters; all 4 fully circular params concentrated in the jump process J[P]. b_min revised 0.05→0.03; k_jump recalibrated 3.0→2.5 (preliminary non-Turchin MLE). 3-tier out-of-sample validation protocol (LOOCV / Blocked-CV / CPCV) designed. Epistemological confidence revised down 5.8→5.5/10. No new Polymarket predictions — internal moratorium until calibration improves.

v0.5.8April 16, 2026Approved with caveatsCliodynamicist

C13-1 STRUCTURALLY RESOLVED: 6 independent non-Turchin cases (Mughal, Meiji, Iran, Weimar, Rwanda, Spain) — 6 PASS / 2 PARTIAL / 0 FAIL. β_U = 0.020/yr defined: 8/8 drift coefficients now have estimates. Zone-conditional PSI validity framework.

v0.5.7April 16, 2026Self-approvedPhilosopher of Science

FIRST PHILOSOPHER LEAD SESSION. Falsifiability 6/10; overfitting risk MODERATE-HIGH. 5 formula changes: scope boundary, PSI causal note, circular flags, rho_DA/chi_horm to Theoretical Scaffolding, Venezuela reclassified.

v0.5.6April 15, 2026Approved with caveatsStatistical Physicist

C7-1 PSI ITO RESOLVED (12-session journey). Full dΨ SDE derived, sympy-verified. Novel w=0.5 sign-change prediction. CROSS-013 downgraded CRITICAL→HIGH. Period revised [150, 265]yr.

v0.5.5April 14, 2026Approved with caveatsStatistical Physicist

F_pol (A_6 polarization drift) APPROVED with surgical fixes. Limit-cycle period FORMALIZED [165, 327]yr envelops empirical [160, 335]yr.

v0.5.4April 11, 2026Approved with caveatsComputational Sociologist

Limit-cycle reframe APPROVED: Turchin phases are quadrants of ONE limit cycle (Hopf bifurcation). Period discrepancy mechanism identified (3 factors). FINAL BOOTSTRAP SESSION.

v0.5.3April 10, 2026Approved with caveatsEconophysicist

All Section A defined: α_pareto=1.5, α_tail=3.0, m_crash=0.33, T_debt 7yr/75yr, T_ineq~125yr. 5/6 drift coefficients specified. α_tail~3 validates FP+jump architecture.

v0.5.2April 9, 2026Approved with caveatsStatistical Physicist

CRIT-01 RESOLVED: 10D → 8D state vector (Ψ and φ now observables). CRIT-02 PARTIALLY RESOLVED: jump kernel formalized. γ_conf sigmoid form APPROVED.

v0.5.1April 8, 2026Approved with caveatsEvolutionary Psychologist

9/13 Θ_fixed defined. HYBRID floor+overlay model for evolutionary constants. Cooperation invariance (Spadaro 2022: 70 societies) — STRONGEST finding.

v0.5.0April 7, 2026Approved with caveatsPolitical Scientist

Institutional vector I_t = (R_t, V_t, B_t, P_t, X_t) fully defined. Per-equation drift modulations A_1–A_8 with institutional constraints. π_path=0.96; δ_prop specified.

v0.4.0April 7, 2026Approved with caveatsBayesian Statistician

Bayesian Confidence Architecture defined (Section 6). Prior catalog: 12 informative + 8 placeholder. First prediction: NATO exit P=2.5% [0.5%, 8%] vs market 10%.

v0.3.0April 6, 2026Approved with caveatsCliodynamicist

8 macro parameters defined: λ_0, Ψ_threshold, Ψ_critical, k_jump (jump process); T_secular (secular cycles); E_threshold (elite overproduction); F_fiscal; α_war. 5 Philosopher fixes applied.

v0.2.0April 6, 2026Approved with caveatsBehavioral Neuroscientist

14 micro-parameters defined. 4 critical parameters: λ (loss aversion), β_td (temporal discounting), γ_conf (conformity), α_auth (authority deference). 3 parameters flagged as replication failures.

v0.1.0April 6, 2026Approved with caveatsStatistical Physicist

Full FP+jump formalization. 10D state vector formalized. Three order parameters (PSI, phi, Gamma) defined. Turchin-PSI connection established.

v0.0.1April 6, 2026Approved with caveatsStatistical Physicist

Framework skeleton: Fokker-Planck + jump process architecture. 10D state vector proposed. PSI composite index architecture sketched.